Larkspur ST over San Lorenzo River
PoorSanta Cruz County, California · 0.2 MI E Highway 9 · Structure no. 36C0068
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 132 ft
- 3 main spans
- Daily traffic
- 1,500
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Larkspur ST over San Lorenzo River is a prestressed concrete stringer/multi-beam or girder carrying Larkspur ST over San Lorenzo River in Santa Cruz County, California. It was built in 1957, so it is 68 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 1,500 vehicles a day, roughly 5% of them trucks, projected to reach 2,047 by 2042. The structure is 132 ft (40.2 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Larkspur ST over San Lorenzo River built?
It was built in 1957, making it 68 years old in 2025.
What condition is Larkspur ST over San Lorenzo River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.
How much traffic does Larkspur ST over San Lorenzo River carry?
About 1,500 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Larkspur ST over San Lorenzo River?
The structure is 132 ft (40.2 m) long with a longest span of 52 ft (15.9 m) and a deck 16 ft wide.
Who owns Larkspur ST over San Lorenzo River?
It is owned by the County Highway Agency.